Signaling apparatus for telephones.



N5; 845355. PATENTED MAR. 19, 1907.

- -A. A. MONSO'N.

SIGNALING APPARATUS FOR TELEPHONES;

APPLIQATION FILED MAR. 31.1.906.

2 SHEETfi-SHBBT 1.

W/Yl VESSES: 726075 [NVE/vm/e,

A TTORNE 1 5 'N0.Q 7,'355. Y 'PATENTED MAR. 19, 1 907.

' A. A. MONSON.

SIGNALING APPARATUS FOR TELEPHONES.

- APPLIOATiON FILED MAR. 31.1906.

' 2 SHEETS-SHEET z.

MEI 1134 2 i my. a.

WITNESSES:

l of the station to becalledl UNIT-.1511) sTA'F S' AUGUi's'l ALVIN noxsox, or

PA ENT, OFFICE.

MLYXEAPOLIS, nixxnstrri.

sleuALme APPAReTus FOR TELEPHONES.

Specification of Applicationfiled March 31, 1

it To to whom it may concern:

vide a calling device of the dial type, in i which the dialflo r similar member is first 5 call and then-is restored to its zero orv normal type wheresprings or the like are employed a will more fully hereinafter ap Be it known that I Atetsr Anvlx Mor sox, a citizen of the United-States, residing at Minneapolis, in the county-of Hennepin and State of Minnesota,,have invented a new i and useful Signaling Device for Telephones,

A further object of the invention is to proturned'to adjust it in position to send the position and during its return movement affects the making and breaking of the signaling-circuit, so that it is necessary for the subscriber to restore the calling device to the zero or initial position before his call can be sent, as distinguished from other devices. of the to return the callin' mechanism to zero position.

A still further object of the invention is to j provide a callingudevice of-improvedconi struction which is automatically locked and retained in position until released by the upward movement of thereceiver-hook.

A still further object of the invention is to provide an improved calling device the position of which is adjusted to break a circuit automatic-ally when the receiverisplaced on 1 the hook. 1

A still further object of the invention is to simplify, improve, and rearrange the circuits and circuit-closing devices to permit the closj in of circuits through calling, ground, or tafkin wires.

Wit 1 these and other objects in view, as

ear, the ir'tvention consists in certain nove inafter' fully described, illustrated in the accompanying drawings, and particularly termed the talking-Wire.

portion of the door 11 is rovided'with an' eatures of conetructlon and arrangement of parts, here- I Letters Patent.

Patented March 19, 1907.

906. fieriai No. 309,201-

pointed out in the appended claims, it being understood that various changes 111 the form,

proportions, size. and minor details of the structure may be inadewithout departing from the spirit or sacrificing any vantages of the invention. 7

- In the accompanying drawings, Figure 1 is .an elevation of a telephone switch-box provided with. a calling mechanism constructed in accordance with the invention, the door of thebox being shown in open position. Fig. 2 is a front view of theswitch-hox, a portion of the calling-disk being broken away'in order to more clearly illustrate the construction.

Fig. 3 is an elevation of the innerface of the door of the switch-box, the switch-box being shown in section; Fig. 4 is a vertical-section through the door of the switch-box.

-. n Similar numerals of reference are employed to indicate correspondin parts throughout l the several figures of they rawings.

The switch-boxv 10 of each substation is provided with a hinged door 11, which is shown in open position in order to more clearly illustrate the construct-ion and arrangement of the circuits and circuit-controlling mechanism, andat the top of-the switch-box are arranged three binding-posts 12,13, and 14, the binding-post 12 being connected to a signalingdine 15 which runs to the central station,-the binding-post 13 being connected to a grounded wire 16,-and the hinding-post 14 being connected to a wire 17, which leads to the central station and is The central opening for the reception 0 a sleeve 19, within which is mounted a spindle 20, the shaft being arranged to rotate independently of said sleeve. To the outer end of the spindle.

is secured a calling-disk 21, having an operating-knob 22 for convenience in turning the disk first in one direction and thenm the other direction to send the number of impulses necessary to connect thecalling-station to the called station. The periphery of this disk is graduated, and the graduations are provided with letters'or numerals indieating the numbers of the several stations inchided in the system, and thedisk in the present instanceis shown as provided with twenty numerals, although the number. may

be increased or diminished.

The spindle 20 carries'at one end aaratchetwheel 24 and atthe opposite end a circuitclosing disk 25. The ratchet-wheel fits within the dished-portion of the disk 21 and is engaged by apawl 26, carried byv said disk 21, so that when the disk is turned tothe right the" paWl will click overthe teethof the ratchet-wheel withoutturningthc latter; but when the'disk isfturned tothe "lef t the movement will be transmitted through the pawl to the ratchet-wheel and shaft 19; and the.

circuit closingdisk 251will also be turned. The ratchet-wheel 24is-provided with teeth 'of a number corresponding to the number of graduations on the'disk 21., and the circuitclosing disk also has a correspoin'ling mum ber of teeth or shoulders 26, which may move' into engagement with the end ofa spring,-

contact 27and'foree the same into'engage- .ment'with a contact 27 for the closingthe.selecting-circuit y Y The springs 27 and 27 are carried hyins sulating-blocks 28, secured to the innerfaee v of the door, and the free end of spring, 27 is curved downward and normally lies in a;

spaee'betweentwo of the teeth 26, but out of contact wi'th the disk 25, the selectingcircuit being normally broken.

, by a stop-pin 2 tact 27 is connected to a wire 33, leading to a second hinge 34. in operating thispart of theinechamsm the highestnumeral 20 of the calling-dial normally stands in a position opposite an indieator orpointer a", and the spriiig-eontadc 27 is normally opposite one ofthespaeesb'etween the teeth 26 of the selecting-disk. When a subscriber wishes to call a substation- -for instance,substation 5-he grasps it theknob 22 and turns the disk 2| to the rig until thenumeral 5 of the disk is opposite the indicator During:' this movement the pawl 26 clicks over the teeth of 'the ratchet wheel 24, but the ratchet-wheel and the selecting-disk are held stationary by a lockingpawl35, pivoted to the'inner face ofthe door and under the control of the receiver-hook 36, which when depressed by the weigl'it of the receiver R engages an arm 37 projecting from the )awl 35, and presses the toothed inner end oi the pawl-between two of the teeth of the seleeting disk. The subscriber then removes his receiver from the hook and the latter is elevated in the usual manner, and as the inner end of the locking-pawl 35 is much heavier than. that end which engages the receiver-hook it will move by gravity from engagement with the selecting-disk, whereupon the subscriber turns the dial 21 to the left, and the pawl 26 engages the teeth of the ratchetwheel 24, turning the latter, and theselectingpurpose of v engaged by an arm 3'S,'projecting disk 25 and .the teeth 26" of saidFdisk-pass successively under the spring-contact 27,

moving the latter into and out of engagement, i with the contact27" and making andbreak in the selecting-circuit live times, 'corrc spending to the number of the stationggto be called, andatthe completion of l,l1ismo\' ement the contact-spring '27 rests ineontact with one of the teeth of theselectingdisk and with the upper contact 27 and'i mains in that position to hold the circuit til the conclusionjof the converse-tie Projecting from the inner face of tl ing-disk is a crown ratchet-wheel 37 teeth of a mnnlier'corresponding to *ber of teeth of the selecting-diskw tecth'of this ratchet-wheel arcarr from-the receiver-hook these p so proportioned and arranged that n'lieirtlie x-re'ceiver is once more hung on the aook'the arm 38 in moving downward 'will engage'oi'ie to the number of the station to behalled, and

than the highest number ofthe disk t 1e disk may be turned more than asing'le. revolution-J For instance, if the station to l lutions, and as, each irevolution of the. disk tions would be equal t ouonel' unclred impulses sent over the selectingline;and then the operator' turns the disk to the right until the number 7 appears on the indicator 1: and

then to the left until the highest number is again under the indicator to, so that 'onehun- 'dred and seven impulses are sent to centralv station, and substation 107 will be antomatically connected by the mechanism at the central station.

At each of the substations is a transmitter T, an inductorium 1, 21 call bell Cfanda relay 40, the latter'being so connected in the line that when a canin -circuit is closed it will connect the call-bell .with the local battery B; so that the bells of any station will ring no tral station.

Within the switch-box are arranged two, blocks 41 and 42, formed of insul'atingmaterial and carrying ci'rcuit-elosin strips 43 and 44, that are insulated from eac 1 other. The lower end of'the strip 44 is arranged in the path of movement of an upwardly-bent arm p of the teeth of the crown-ratehetc'iiliand will turn the selecting-disk for a distanc'cequal to 1 should the number of that station be reater ioc . t number 107,'the ealling-disk '21 will be' turner. to'the leftto the extentoffive eomplete'revoo .5 means twenty makes andhreaks, revolu matter how remote itmay be from the een- 45, that is carried by the inner end of the switch-hook 36, so that when the receiver is on the hook this .a'rm engages the contact 44 a Wire 49 to the grdundbinding-post 13. The

and holds it out'of engagement'wi'tha con.-

tact 46, that is secured-within theswitcha contact 43 normally en ages a vstationary contact'50", that is secure Within, the switch box, and saidcontact 43 is connected by a wire 51'to the relay-magnets 40, the wire being thence continued to the binding-post 14 of the talking-Wire. At one side o'flhe 'tele-f;

phone-box is .a'push-button 52, extending through an openingin the-side wall of the box and arranged to engage the contact 43 and press the same into engagement with the contact 44, and as a result of this contact 43 is moved out of engagement with contact 50 and contact 44 is moved out oflengagement withthe contact 46. Arrangedabelow the receiver-hook 36 are four spring-contacts 55 56 57 58', the free end of the contact 57 being bent upward and being engaged by the receiver-hook-Wh'enthe latter 1s depressed by the Wei ht of the receiver, and when the receiver- 00k is down the contact 57 is forced'into engagement with the contact 58, while the contacts 55 and 56 are wholly disconnected.

Tracing" now the selectingafircuit fromground at the substation 'to wire 16, bindingpost 1.3, wire 49, contact 46, (receiver re-.

moved from l1ook,) contac'tr44, wire 48, hinge 32, wire 31, spring-contact- 27', contact 27, wire 33, hinge 34, wire 60, binding-post 12,

wire 15, central station, and at the central station through the automatic" selecting mcchanism and. a battery to ground. The

selecting impulses having been sent and the spring 27 being allowed to remain on one of the teeth 26 of the selecting-disk, the sub- 'scriber at the calling-station depresses the button '52 and forces the contact 43 into engagement with rhecontact 44, thus moving contact 43 from contact 50 and contact 44 from contact 46. This completes a circuit from the battery and signaling mechanism at central through wire 15, binding-post 12, wire 60, hinge- 34, wire33, contact 27, springeomact 27, wire 31, hinge-32, wire 48, contact 44, contact 43, wire '51, the electromagnets of elay 40, and out through bindingpost .14 and the lalkingavire 17 back to the cenrral siai ion, and from thence, as will be hereinafter (lesc ibed, through the similar circuits of the called subscriber in order to energize the relay-magnets 40 at both the calling and the called stations. 7

When the relay-magnets are energized, each magnet attracts its armature 61,1md

the .62' moves over against the contact 63that is carriedby-the. casing, and this closes. a local circuit/through thebattery B through wire 65, contact 63,-arm 'ture lever 62, wire 66, the electromagnets the call-bell, and call-bell, frame to wire '6 how remote the station may be from central the call-bell willflbe sounded withsufficient" distinctness to be heard. After'pressing the; button the call-bell of the calling statiod' H .is sounded the subscriber knows that. the "I callebell of the called station has also sounded and that he is connected; but if the bell fails -to sound he is informed that the line is-busy and thathe cannot connect at that time.

-. .In followingthe talking-eircuit from the talking-wire 17 it will be seen that the cur ,rent' will flow throughbinding-post 14, wire '51, andrthe' relay-magnets to the spring=contact 48, contact 50, wire 70 to the secondary of the inductorium, wire '71, receiver R, wire '72, contact 55, contacts 56 57, wire 73, con' .tact 46, v4 9, binding-post 13, and to ground bywire 16, the connections at the lar manner. v

The primary circuit may be traced'from battery B through wire 80, transmitter T,

thence by wire 81 to the primary of the, inductorium, wire 72, contact 55,. (receiverhook elevated,) contact 56,- wire- 82 tobat- 'tery. -When the receiver-hook is down, contacts 55 and 56 are disconnected and the primary circuit is broken.

Whenfthe receiver-hook is down, the line other substation-being completed in a simiice is open'to receive a calling-signal from the-.

talking-wire 17, bindin -post 14, wire 51, the electromagnet 40 of t e relay,.contact 43,

wire 85, contact 58, contact 57, wire 73, contact 46, wire 49, binding-post 13, and wire 16 to ground. fig I claim- 1. In selective calling and signaling appa ratus, a revoluble circuit-closing disk having a plurality of spaced circuit-closing means, a receiver-hook, a receiver-hook-controlled looking means for holding said disk from movement in either direction while the receiverhook is down, a manually-operable means for turning thedisk toeffect make and break of the calling-circuit, said disk being movable at the completion of a calling operation der the control of the receiver-hook for moving said disk to break circuit when the re.

eclver is placed on the'hook.

2. In telephony, a substation callingand' selecting device, including a revoluble disk, having a notched periphery, a pair of con-- tacts under the control of said disk, said disk 7 i 20 a to maintain the circuit closed, and means unj position, and 1e receiver-hook contnoiled imea'ns for moving said disk to break circuit when said receiver-hook is depressed.

In telephony, a substation'ez'dling' and signaling-mechanism. compgising revol'uble disk having aQnotched' periphery, a pair of springseonte'cts, one of which is, adapted for engagement With-the periphery of the disk, means for limiting the movement of saidcontact in the direction of the disk, said disk be: ing nenuelly adjustable toremain in circuit:

clos ng position at the end of the ceiling op- .eretlon, and e receiver-hool -co11tro1]edmeans signaling means comprising a ,revolnble disk having e notched periphery, a spring-contacts for moving the disk to break circuit. v 7 i In telephony, e su'bstationce'lling and memhererrenged to engage the periphery ofthe disk,-e stop-pin for limiting the nrovement of said member in thedirection of the disk, ve crown ratchet-wheei on one face of the disk, at receiver-hook, and an arm carried by the receiver-hook index-ranged to engage said crOwnmtchet-wheiei.

the disk,- zihd ane'rin carriedb hooknnd arrenged to engag' said disk from movement. In testimony that I claim th iny own I have hereto affixed ln'the presen Witnesses.

-CHAS. S. OAiRNs,

H. C. HAYNES, i

In telephony,ra substa signaling means, comprisl V I v disk, :1 receiver, a receiver-hook, a, disk-lock-fl ingdevice movable into enge enientrwith r the-"disk when the receive-1' is 13% hook,"a* crown ratchet-Wheel o iilin -15nd 5.11 ;i ng i revolublel ga revolub1e'diskf 5 ry, a locking-lever to engage the disk,

epre'ssediand lock 4o e foregoing as my Signe't Ife} MONS' ON acedlon the o n onevfae'eirof 0 y the'receiven' f e said 'ratchet- I 

